Who was Abd Allah ibn Muhammad in the Mahdist movement?

Abd Allah ibn Muhammad was a prominent figure in the Mahdist movement who hailed from the Ta'aishah tribe of the Baqqarah Arabs. He was considered the foremost follower of the Mahdi, Muhammad Ahmad ibn Abd Allah, and was designated as his caliph (khalīfah, meaning "successor").123

Following the sudden death of the Mahdi in June 1885, Abd Allah succeeded him as the leader of the Mahdist state. His tenure involved securing his authority against competing factions, including the Mahdi’s relatives, and attempting to fulfill the Mahdi's vision of a universal jihad to reform Islam. Despite his autocratic rule and the eventual collapse of the Mahdist state under the technological superiority of Britain in 1898, he maintained a significant level of acceptance among the Sudanese people. He was killed in 1899 during the final stages of the conflict.4156